Blue Island is a city in Cook County, Illinois, United States. The population was 22,556 at the 2010 census. Blue Island was established in the 1830s as a way station for settlers traveling on the Vincennes Trace, and the settlement prospered because it was conveniently situated a day's journey outside of Chicago. Since its founding, the city has been an important commercial center in the south Cook County region, although its position in that respect has been eclipsed in recent years as other significant population centers developed around it and the region's commercial resources became... spread over a wider area. In addition to its broad long-standing industrial base, the city enjoyed notable growth in the 1840s during the construction of the feeder canal for the I & M canal, as the center of a large brick-making industry beginning in the 1850s , and, beginning in 1883, as host to the car shops of the Rock Island Railroad.
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